<template>
    <div class="sidebar">
        <el-menu
            class="sidebar-el-menu"
            :default-active="onRoutes"
            :collapse="collapse"
            background-color="#324157"
            text-color="#bfcbd9"
            active-text-color="#20a0ff"
            unique-opened
            router
        >
            <template v-for="item in items">
                <template v-if="item.subs">
                    <el-submenu :index="item.index" :key="item.index">
                        <template slot="title">
                            <i :class="item.icon"></i>
                            <span slot="title">{{ item.title }}</span>
                        </template>
                        <template v-for="subItem in item.subs">
                            <el-submenu
                                v-if="subItem.subs"
                                :index="subItem.index"
                                :key="subItem.index"
                            >
                                <template slot="title">{{ subItem.title }}</template>
                                <el-menu-item
                                    v-for="(threeItem,i) in subItem.subs"
                                    :key="i"
                                    :index="threeItem.index"
                                >{{ threeItem.title }}</el-menu-item>
                            </el-submenu>
                            <el-menu-item
                                v-else
                                :index="subItem.index"
                                :key="subItem.index"
                            >{{ subItem.title }}</el-menu-item>
                        </template>
                    </el-submenu>
                </template>
                <template v-else>
                    <el-menu-item :index="item.index" :key="item.index">
                        <i :class="item.icon"></i>
                        <span slot="title">{{ item.title }}</span>
                    </el-menu-item>
                </template>
            </template>
        </el-menu>
    </div>
</template>

<script>
import bus from '../common/bus';
export default {
  data() {
    return {
      collapse: false,
      items: [
        {
          icon: 'el-icon-user-solid',
          index: '1',
          title: '小程序用户管理',
          subs: [
            {
              index: 'OrdinaryMember',
              title: '普通会员'
            }, {
              index: 'MerchantMember',
              title: '商家会员'
            }, {
              index: 'UnauthenticatedUser',
              title: '未认证用户'
            }]
        },
        {
          icon: 'el-icon-s-shop',
          index: 'MerchantApplication',
          title: '商家申请'
        },
        {
          icon: 'el-icon-s-goods',
          index: 'MerchandiseManagement',
          title: '商品管理'
        }, {
          icon: 'el-icon-s-order',
          index: '2',
          title: '订单管理',
          subs: [
            {
              index: 'OrderList',
              title: '订单列表'
            }, {
              index: 'AfterSalesOrderList',
              title: '售后订单列表'
            }]
        }, {
          icon: 'el-icon-s-finance',
          index: 'WithdrawalsRecord',
          title: '提现记录'
        },
        {
          icon: 'el-icon-s-opportunity',
          index: 'CashBackRecord',
          title: '返现记录'
        },
        {
          icon: 'el-icon-s-marketing',
          index: 'ServiceFeeSetting',
          title: '服务费设置'
        },
        {
          icon: 'el-icon-s-comment',
          index: 'SocialManagement',
          title: '社交管理'
        },
        {
          icon: 'el-icon-s-custom',
          index: '3',
          title: '系统管理',
          subs: [
            {
              index: 'userList',
              title: '后台用户管理'
            }, {
              index: 'RolePermissions',
              title: '角色权限'
            }
          ]
        }
      ]
    };
  },
  computed: {
    onRoutes() {
      return this.$route.path.replace('/', '');
    }
  },
  created() {
    // 通过 Event Bus 进行组件间通信，来折叠侧边栏
    bus.$on('collapse', msg => {
      this.collapse = msg;
      bus.$emit('collapse-content', msg);
    });
  }
};
</script>

<style scoped>
.sidebar {
    display: block;
    position: absolute;
    left: 0;
    top: 70px;
    bottom: 0;
    overflow-y: scroll;
}
.sidebar::-webkit-scrollbar {
    width: 0;
}
.sidebar-el-menu:not(.el-menu--collapse) {
    width: 250px;
}
.sidebar > ul {
    height: 100%;
}
</style>
